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6B9551 — STUD,PLAIN

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

6B9551: STUD,PLAIN.

The STUD,PLAIN is a the manufacturer industrial component. Key specifications include material: STEEL, thread_class: 2A NUT THREAD A, thread_length: 0.688 INCHES MINIMUM NUT THREAD IN, overall_length: 1.875 INCHES NOMINAL IN, hardness_rating: 24.0 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM, thread_direction: RIGHT-HAND STUD THREAD. This part is cataloged in the U.S.

Government catalog under NSN 5307-00-423-9987, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
6B9551
NSN: 5307-00-423-9987
FSC: 5307 — Studs
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
materialSTEEL
thread_class2A NUT THREAD A
thread_length0.688 INCHES MINIMUM NUT THREAD IN
overall_length1.875 INCHES NOMINAL IN
hardness_rating24.0 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM
thread_directionRIGHT-HAND STUD THREAD
nominal_thread_size0.375 INCHES STUD THREAD IN
cotter_pin_hole_diameter0.109 INCHES NOMINAL FIRST HOLE IN
thread_quantity_per_inch24 NUT THREAD
thread_series_designatorUNIFIED NATIONAL COARSE (UNC) STUD THREAD
distance_from_cotter_pin_hole_centerline_to_nut_end0.219 INCHES NOMINAL FIRST HOLE IN
NSN5307-00-423-9987
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 6B9551 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
COTTER PIN HOLE DIAMETER: 0.109 INCHES NOMINAL FIRST HOLE IN
•
THREAD LENGTH: 0.500 INCHES MINIMUM STUD THREAD IN
•
HARDNESS RATING: 24.0 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM
•
THREAD DIRECTION: RIGHT-HAND STUD THREAD
•
NOMINAL THREAD SIZE: 0.375 INCHES STUD THREAD IN
TECHNICAL CHARACTERISTICS
COTTER PIN HOLE DIAMETER0.109 INCHES NOMINAL FIRST HOLE IN
THREAD LENGTH0.500 INCHES MINIMUM STUD THREAD IN
THREAD LENGTH0.688 INCHES MINIMUM NUT THREAD IN
HARDNESS RATING24.0 ROCKWELL C MINIMUM AND 30.0 ROCKWELL C MAXIMUM
OVERALL LENGTH1.875 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND STUD THREAD
THREAD DIRECTIONRIGHT-HAND NUT THREAD
NOMINAL THREAD SIZE0.375 INCHES STUD THREAD IN
NOMINAL THREAD SIZE0.375 INCHES NUT THREAD IN
THREAD CLASS2A STUD THREAD A
OTHER ITEMS IN FSC 5307 — Studs
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5307-00-000-6436 5307-00-001-1578 5307-00-001-1761 5307-00-001-2366 5307-00-001-4491 5307-00-001-4624 5307-00-001-4625
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 6B9551?
6B9551 is a STUD,PLAIN.
What is the NSN for 6B9551?
6B9551 is cataloged in the U.S. Government catalog under NSN 5307-00-423-9987. This indicates validated use in U.S. government and defense supply chains.
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